scholarly journals Evaluation of Nitroxide Radical Catalyst Activity in C-H Activation Step of the Oxidative Coupling between 9,10-Dihydroacridine and Nitromethane

2019 ◽  
Vol 31 (9) ◽  
pp. 2107-2110 ◽  
Author(s):  
Kousuke Iwasaki ◽  
Yamazaki Yudai ◽  
Hiroaki Gotoh
Keyword(s):  
Oxidative Coupling ◽  
Research Effort ◽  
Catalyst Activity ◽  
Coupling Reaction ◽  
Nitroxide Radical ◽  
Activation Reaction ◽  
Low Toxicity ◽  
The Subject ◽  
Stable Radicals ◽  
Intense Research

Organocatalysts have been the subject of intense research effort because of their low toxicity, facile handling, and eco-friendly characteristics. Recently, the development of C-H activation reaction using organocatalysts has also been studied. Herein, we report the studies on the oxidative coupling of 9,10-dihydroacridine and nitromethane using a series of stable radicals. tert-Butyl(10-phenyl-9-anthryl)nitroxide was found to be an optimal catalyst for the coupling reaction.

Conversion of Limonene over Heterogeneous Catalysis: An Overview

2021 ◽  
Vol 18 ◽  
Author(s):  
Ravi Tomar ◽  
Swati Jain ◽  
Purnima yadav ◽  
Tanima Bajaj ◽  
Fatemeh Mohajer ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Essential Oils ◽  
Heterogeneous Catalysts ◽  
Low Cost ◽  
Citrus Fruits ◽  
Catalytic Systems ◽  
Low Toxicity ◽  
The Subject ◽  
Valuable Compounds ◽  
Intense Research

: The natural terpene limonene is widely found in nature. The (R)-limonene (the most abundant enantiomer) is present in the essential oils of lemon, orange, and other citrus fruits, while the (S)-limonene is found in peppermint and the racemate in turpentine oil. Limonene is a low-cost, low toxicity biodegradable terpene present in agricultural wastes derived from citrus peels. The products obtained from the conversion of limonene are valuable compounds widely used as additives for food, cosmetics, or pharmaceuticals. The conversion of limonene to produce different products has been the subject of intense research, mainly with the objective to improve catalytic systems. This review focused on the application of heterogeneous catalysts in the catalytic conversion of limonene.

Carbon Solvates: Redox Properties and Single Crystal X-Ray Structure

1990 ◽  
Vol 206 ◽  
Author(s):  
S. M. Gorun ◽  
M. A. Greaney ◽  
D. M. Cox ◽  
R. Sherwood ◽  
C. Day ◽  
...  
Keyword(s):  
Single Crystal ◽  
Structural Characterization ◽  
Molecular Level ◽  
Research Effort ◽  
Chemical Properties ◽  
Redox Properties ◽  
X Ray ◽  
The Subject ◽  
Intense Research

Carbon aggregates of various nuclearities have been recently the subject of renewed interest [1]. Despite an intense research, effort no molecular level characterization of C60 and related molecules has been reported yet [1,2]. Moreover, the chemical properties of these materials is virtually unknown. In this paper we report briefly the preparation, electrochemical and structural characterization of crystalline C60/70 solvates [3].

An Unprecedented Cyano-Induced Sodium Nitrite-Catalyzed C(sp3)-H and C(sp2)-H Coupling Reaction

2018 ◽  
Vol 15 (7) ◽  
pp. 989-994 ◽  
Author(s):  
Ling Li ◽  
Bo Su ◽  
Yuxiu Liu ◽  
Qingmin Wang
Keyword(s):  
Sodium Nitrite ◽  
Oxidative Coupling ◽  
High Resolution Mass Spectrometry ◽  
Coupling Reaction ◽  
13C Nmr Spectroscopy ◽  
Coupling Reactions ◽  
Reaction Conditions ◽  
1H And 13C Nmr ◽  
Oxidative Coupling Reaction ◽  
Oxidative Coupling Reactions

Aim and Objective: During the investigation of sodium nitrite-catalyzed oxidative coupling reaction of aryls, an unprecedented C(sp2)-H and C(sp3)-H coupling of substituted 2-aryl acetonitrile was found. Materials and Methods: The structure of the coupled product was confirmed by 1H and 13C NMR spectroscopy and high-resolution mass spectrometry (HRMS), and comparison of its derivatives with known compounds. The effects of methoxy group in the benzene ring on the reaction were evaluated. Results: The optimized reaction conditions are summarized as follows: CF3SO3H/substrate = 1.5 equiv., NaNO2/substrate = 0.3 equiv., CH3CN as solvent. 2-(4-Methoxyphenyl)acetonitrile and 2-(3,4,5- trimethoxyphenyl)acetonitrile could also generate C(sp2)-H and C(sp3)-H coupling. The coupling reaction occurred as a typical radial mechanism. Conclusion: An unprecedented cyano-induced, NaNO2-catalyzed oxidative C(sp3)-H and C(sp2)-H coupling was reported. The reaction proceeded under very mild conditions, using O2 in the air as terminal oxidant. The unique oxidative manner might provide more inspiration for the development of intriguing oxidative coupling reactions.

A Three Component Iodine-Catalyzed Oxidative Coupling Reaction: A Heterodifunction of 3-Methylindole

2021 ◽  
Author(s):  
Wei Zhang ◽  
Shiqun Xiang ◽  
Weibin Fan ◽  
Jiang Jin ◽  
Yinghua Li ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Coupling Reaction ◽  
Peroxy Radicals ◽  
Metal Free ◽  
Tert Butyl ◽  
Oxidative Coupling Reaction

A metal-free synthesis of heterodifunctional indole derivaties is developed through TBHP/KI-mediated oxidative coupling. The reaction constructs C-O and C-C bonds in succession with the help of tert-butyl peroxy radicals generated...

Direct visualization of photo-induced disulfides through oxidative coupling of para-aminothiophenol

2021 ◽  
Author(s):  
Wei He ◽  
Chang Xia ◽  
Peng Fei Gao ◽  
Jun Zhou ◽  
Yuan Fang Li ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Coupling Reaction ◽  
Chemical Transformations ◽  
Direct Visualization ◽  
Oxidative Coupling Reaction ◽  
Visible Irradiation

Chemical transformations under visible irradiation are interesting in green preparation. Herein, photo-oxidative coupling reaction of para-aminothiophenol(p-ATP) dimerizing to 4-aminophenyl disulfide(APDS) rather than 4,4′-dimercaptoazobenzene(DMAB) was achieved in water by visible irradiation,...

Synthesis of blue light emitting copolymers by oxidative coupling reaction

2003 ◽  
Vol 135-136 ◽  
pp. 201-202 ◽  
Author(s):  
Yingfeng Yu ◽  
Minghai Wang ◽  
Wei Huang ◽  
Shanjun Li
Keyword(s):  
Blue Light ◽  
Oxidative Coupling ◽  
Coupling Reaction ◽  
Light Emitting ◽  
Oxidative Coupling Reaction

scholarly journals A Comparative Study of Target Tracking Approaches in Wireless Sensor Networks

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Asmaa Ez-Zaidi ◽  
Said Rakrak
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Target Tracking ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Future Directions ◽  
Wide Range ◽  
Comprehensive Survey ◽  
The Subject ◽  
Intense Research

Wireless sensor networks have been the subject of intense research in recent years. Sensor nodes are used in wide range of applications such as security, military, and environmental monitoring. One of the most interesting applications in wireless sensor networks is target tracking, which mainly consists in detecting and monitoring the motion of mobile targets. In this paper, we present a comprehensive survey of target tracking approaches. We then analyze them according to several metrics. We also discuss some of the challenges that influence the performance of tracking schemes. In the end, we conduct detailed analysis and comparison between these algorithms and we conclude with some future directions.

Sign in / Sign up

Export Citation Format

Share Document